Unit TRACE
Description
TRACE unit is mainly consist of 4 sets of IR, 1x infrared emitting and 1x infrared receiver for each set. The infrared LEDs should be placed towards and close to the ground where having black tracing lines and white background (or vice versa) layouts.
The IR transmitter keep emitting, at the mean time infrared ray would be absorbed by different color of objects. Black can absorb more ray than other color, so the infrared receiver (infrared sensitive phototransistor) would receive less which makes the resistance value of the phototransistor would vary with different object color. Then we assign an AD convertor tp capture the data.
This Unit communicates with the M5Core via GROVE PORTA I2C (0x5A).
Features
- operation range: The reflecting surface is less than 11mm from the photoelectric surface
- Program Platform: Arduino, UIFlow (Blockly, Python)
- Two Lego-compatible holes
Include
- 1x TRACE Unit
Applications
- Self-tracing robot
Specifications
| Resources | Parameter |
|---|---|
| Net weight | 32g |
| Gross weight | 34g |
| Product Size | 70*16*18mm |
| Package Size | 200*100*10mm |
EasyLoader
- After downloading the software, double-click to run the application, connect the M5 device to the computer through the data cable, select the port parameters, click "Burn" to start burning. (For M5StickC burning, please Set the baud rate to 750000 or 115200)
PinMap
| M5Core(GROVE A) | GPIO22 | GPIO21 | 5V | GND |
|---|---|---|---|---|
| TRACE Unit | SCL | SDA | 5V | GND |
Schematic
Related Link
Mega328 ISPDownload interface Pin foot definition
Example
Arduino
UIFlow
Feature Introduction
TRACE is a commonly used sensor for auto-car toy. It is used to determine whether there are black lines by receiving reflected light.
Get analog value Return analog value
Get digital value Return analog digital value
set limit should value Set limit value
Usage
